JPH0548281Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a disk attachment/detachment device used when attaching/detaching an information recording medium such as an optical disk to/from a turntable. The present invention relates to a disk attachment/detachment device suitable for use with information recording media such as <<Prior Art>> In recent years, an information recording/reproducing apparatus as shown in FIG. 12 has been considered as an information recording/reproducing apparatus using an optical disk or the like as an information recording medium. This is the information recording medium 100
The device is magnetically attached to the turntable 200 for recording/reproduction, and its configuration will be described below with reference to FIGS. 12 and 13. In FIG. 12, an information recording medium 100 (hereinafter referred to as a disk) has recording layers 101 and 102.
The substrates 103, 104 having the recording layers 101, 1
02 is on the inside, and the raised part 10 is formed at the center of the bases 103 and 104.
5, 106 includes a plate 107 made of a magnetic material;
108 is attached. These plates 1
When the disk 100 is attached to the turntable 200 , the rotation axis 20 is located at the center of the
The center hole 109, 1 that fits with the centering part 202 of 1
10 are formed. On the other hand, the turntable 200 is attached to a rotating shaft 201 that is rotationally driven by a drive mechanism (not shown), and the rotating shaft 201 is connected to the rotating shaft 201 by a screw 203.
A disk mounting table 204 fixed at a predetermined position of 1
A large-diameter recess 20 and a small-diameter recess 206 that are continuous with the recess 20 are formed on the upper surface side. The recesses 205 and 206 each have a center hole 207 through which the rotating shaft 201 passes, and the shape of the recess 207 is similar to that of the recess 206.
06 and the bottom surfaces 206 ₁ , 205 ₁ of the recess 205 .
8 is attached by a screw (not shown).
Stepped portion 208 ₁ of this magnet mounting plate 208
When the disc 100 is attached to the turntable 200 , the plate 10 of the disc 100
Magnet 209 that magnetically attracts 7,108
is press-fitted. Here, the recess 205 has an inner diameter D ₂ of the raised portion 105 of the substrate 103 , 104 of the disk 100 .
₁₀₆ , and its depth when the magnet mounting plate 208 is attached.
The height H ₂ is larger than the height H ₁ of the rising parts 105 and 106. As a result, as shown in FIG.
The center hole 110 of 08 is aligned with the centering part 2 of the rotating shaft 201.
When the disc 100 is mounted on the turntable 200 with the disc 100 fitted in
05, the plate 108 is attracted by the magnet 209 with an attractive force _P1 . As a result, the substrate 104 is pressed onto the disk mounting surface 210 of the disk mounting table 204, and the disk 100 is attached to the rotating shaft 210.
It is attached to the turntable 200 by suction while being centered around 01. Further, in this state, an appropriate gap G ₁ is formed between the magnet 209 and the plate 108 , and the attraction force P ₁ set by the strength of this gap G ₁ and the magnet 209 is The rotational force of the rotating shaft 201 is reliably transmitted to the disk 100 by being placed in close contact with the disk mounting surface 210, and when the disk 100 is removed from the turntable 200 , the substrate 104 to which the plate 108 is attached is placed in the vertical position. It is set to an appropriate size so that no excessive force is applied to the upper portion 106 than necessary. With the above-described configuration, as shown in FIG.
The disk 100 has a suction force on the turntable 200 .
The rotating shaft 20 is attached magnetically with P ₁ .
1 for recording/reproduction. <<Problems to be solved by the invention>> Conventionally, in the above-mentioned information recording/reproducing apparatus,
The disk 100 is attached to and detached from the turntable 200 by grasping the peripheral edges of the substrates 103 and 104 of the disk 100 by hand. However, as mentioned above, the disk 100 has a substrate 103,
Plate 10 attached to the center of 104
7 and 108 are attracted by the magnet 209 and magnetically attached to the turntable 200 .
To remove the disc 100 from the turntable 2 , grasp the peripheral edges of the boards 103 and 104 with your hands.
00, the substrates 103, 104
A force is applied to the periphery of the substrate 1.
03,104 warped upwards, good record/
There is a possibility that playback will not be performed. Furthermore, since the disk 100 is directly touched by the palm or fingers during the manual attachment/detachment described above, the surface of the disk 100 may be accidentally scratched, which also becomes an obstacle to good recording/reproduction. <Means for Solving the Problems> (1) A disk attachment/detachment device for attaching and detaching a disk having a magnetic member attached to the center of rotation to a turntable having a magnet attached to attract the magnetic member; A pressing shaft that presses a member, a base body that movably holds the pressing shaft, which is formed with a through hole through which the pressing shaft passes, and a base body that is attached to a position facing the magnetic member of the base body, and that is attached to a position facing the magnetic member, and that It consists of a magnet that attracts magnetically. (2) A disk attachment/detachment device for attaching and detaching a disk having a magnetic member attached to its rotating center to a turntable attached to a magnet that attracts the magnetic member, and having an operation part and having the magnetic member at one end. A shaft to which a magnetically attracting magnet is attached, a through hole through which the shaft is movably penetrated, and a recess in which the magnet is movably accommodated is formed on the side facing the magnetic member. It consists of a base body. 《Example》 The present invention solves the above problems, and the following:
One embodiment will be described in detail with reference to the drawings. 1, 2, and 3 are cross-sectional views showing one embodiment of the device of the present invention, in which 1 is a disk attaching/detaching device according to the present invention, 100 is a disk as an information recording medium,
200 is a turntable. Incidentally, as mentioned above, the disk 100 is attached to the turntable 200 by magnetic attraction, and a description thereof will be omitted. In FIG. 1, a pressing shaft 4 having a protrusion 3 on the lower surface 41 is located at the axial center of the cylindrical member ₂ , which is the base body of the disk attachment/detachment device 1 and has a larger diameter at the bottom.
A through-hole 5 is formed which penetrates the body so as to be movable in the -B direction. The upper end of the pressing shaft 4 has a threaded portion 4 ₂ .
is formed, and this threaded portion 4 ₂ is threaded into a screw hole 6 ₂ formed in the operating member 6 having a substantially U-shaped cross section, so that the pressing shaft 4 and the operating member 6 are integrated. moreover,
Since this operating member 6 is inserted into a recess 7 formed on the upper surface side of the cylindrical member 2 so as to be movable in the direction of the arrow A-B, the pressing shaft 4 and the operating member 6 are integrally connected to the through hole 5 and the recess. It is possible to move in the direction of arrow A-B within 7.Furthermore, the opposing surfaces ₆₃ ,
A coil spring 8 is hung in a compressed state between 7 _{and 3} , and a small diameter recess 10 formed on the lower surface side of the cylindrical member 2 is placed in the recess 4 ₃ near the lower end of the pressing shaft _4. A ring-shaped stopper 9 that comes into contact with and restricts movement of the pressing shaft 4 in the direction of arrow B is fitted. Therefore, in the state shown in FIG.
And the pressing shaft 4 is in a state where it receives a predetermined eccentric force in the direction of arrow B with respect to the cylindrical member 2. In the embodiment, the eccentric force biasing means for biasing the operating member 6 and the pressing shaft 4 is composed of the coil spring 8 and the stopper 9, but this is not limited to the embodiment. It can take various forms. On the other hand, a large-diameter recess 11 formed continuously with the recess 10 on the lower surface side of the cylindrical member 2 has a center hole 12 through which the pressing shaft 4 passes, and its shape is formed so that it can fit into the recess 11. The magnet mounting plate ₁₃ is attached with screws (not shown), and a magnet ₁₄ having the same strength as the magnet 209 attached to the turntable 200 in FIG.
is press-fitted. Here, the inner diameter D ₃ of the recess 11 is slightly larger than the outer diameter D ₁ of the raised parts 105 and 106 of the substrates 103 and 104 of the disk 100 in FIG.
In addition, when the magnet mounting plate 13 is attached, its depth H ₃ is equal to the height H ₁ of the rising parts 105 and 106.
It is designed to be larger than the In the above configuration, when the disk 100 is attached to the disk attachment/detachment device 1 by inserting the upright portion 105 into the recess 11 as shown in FIG.
05 is fitted into the recess 11 with some play, and the plate 107 accommodated in the recess 11 is attracted by the magnet 14 with an attractive force _P2 . This results in
The substrate 103 of the disk 100 is pressed onto the lower surface 2 ₁ of the cylindrical member 2, and the disk 100 is fixed to the disk attachment/detachment device 1 by suction. Here, between the magnet 14 and the plate 107, there is a turntable 100 in FIG.
A gap _G2 smaller than the gap _G1 is formed between the magnet 209 attached to the side and the plate 108 of the disk 100 attracted by it, and the attraction force P is set by the strength of this gap _G2 and the magnet 14. ₂ is set to be stronger than the attraction force _P1 by which the magnet 209 attracts the plate 108. In the above embodiment, the strengths of the magnet 14 and the magnet 209 are made equal, and the gap _G2 is
Although the structure is such that the attraction force P ₂ is set to be smaller than G ₁ and stronger than the attraction force P ₁ , the structure is not limited to this, and the magnet 14 and the plate 10
Of course, any structure may be used as long as the attraction force P ₂ generated between the magnets 209 and the plate 108 is stronger than the attraction force P ₁ generated between the magnet 209 and the plate 108. Next, the actual operation of attaching and detaching the disk 100 to and from the turntable 200 using the disk attaching and detaching device 1 having the above configuration will be described in detail. First, put the disk 100 on the turntable 20.
0 will be explained using FIGS. 2 to 5. First, an operator holds the disk attachment/detachment device 1 in his hand and attaches the disk 100 so that the raised portion 105 of the substrate 103 of the disk 100 and the recess 11 fit together, as shown in FIG. This results in
As described above, the upright part 105 and the plate 107 are accommodated in the recess 11, and the plate 107 is connected to the gap _G2.
Since the substrate 103 is attracted to the magnet 14 by the attraction force _P2 through the magnet 14, even if there is some play in the fitted state, the disk 100 will be able to maintain the substrate 103 from the bottom surface 2 of the cylindrical member 2.
₁ and is in a state where it is suction-fixed to the disk attachment/detachment device 1 . Furthermore, as shown in FIG. 3, when the center hole 110 of the plate 108 of the disk 100 suction-fixed to the disk attachment/detachment device 1 is fitted into the centering portion 202 of the rotating shaft 201, the upright portion 106 and the plate 108 are Since the plate 108 accommodated in the recess 205 of the disk mounting table 204 is attracted by the magnet ₂₀₉ through the gap G1 with an attractive force _P1 ,
In the disk 100 , the substrate 104 is the disk mounting surface 2.
10 and is attached to the turntable 200 by suction in a centered state. Then, grasp the cylindrical member 2, which is the main body of the disk attachment/detachment device 1 , with your hand, place your thumb on the top surface of the operating member 6, and press the operating member 6 in the direction of arrow A against the repulsive force of the coil spring 8. As shown in FIG. 4, the protrusion 3 of the pressing shaft 4 is first inserted into the center hole 109 of the plate 107, and the lower surface ₄₁ of the pressing shaft 4 comes into contact with the plate 107, causing the operation member 6 to move in the direction of arrow A. Regulated. When pressed further from this state, the cylindrical member 2 resists the repulsive force of the spring 8 and the bottom surface 73 of the recess 7 is pressed against the end surface ₆₄ of the operating member 6 in the direction of arrow B, as shown in _FIG . Move to the point of contact. As a result, the raised part 105 of the substrate 103 of the disk 100 and the plate 107 are ejected from the recess 11, and the gap G ₂ between the magnet 14 and the plate 107 increases, so that the attraction force P ₂ of the magnet 14 acting on the plate 107 decreases. Then, the disk attachment/detachment device 1 is removed from the disk 100 that is attached to the turntable 200 by suction. Next, put the disk 100 on the turntable 200.
Figure 3, Figure 6, and Figure 7 show the operation when removing the
This will be explained using figures. First, as shown in FIG .
Attach the disk attachment/detachment device 1 to 0 in the same manner as described above. As a result, the disk 100 is placed in the recess 11.
The rising part 105 and the plate 107 are accommodated, and the plate 107 connects to the magnet ₁ through the gap G2.
4 with suction force P ₂ , disk 10
0, the substrate 103 is pressed onto the lower surface ₂₁ of the cylindrical member 2 and is suction-fixed to the disk attachment/detachment device 1 . Here, as mentioned above, since the gap G ₂ is formed smaller than the gap G ₁ , the magnet 14 attracts the plate 108 of the disk 100 to the turntable 200 side more than the attraction force P ₁ by which the magnet 209 attracts the plate 108 of the disk 100 to the turntable 200 side. Since the suction force _P2 that attracts the plate 107 toward the disk attachment/detachment device 1 side is stronger, if the disk attachment/detachment device 1 is lifted in the direction of arrow B from this state, the disk 100 will be pulled up as shown in FIG. It is lifted together with the attachment/detachment device 1 in the direction of arrow B and removed from the turntable 200 . Then, as shown in FIG. 7, by pressing the operating member 6 to a predetermined position in the direction of arrow A against the repulsive force of the spring 8, the protrusion 3 of the pressing shaft 4 is pressed against the substrate 1.
07, and further presses the operating member 6 to a position where its end surface ₆₄ contacts the bottom surface ₇₃ of the recess 7.
₁ presses the plate 107 in the direction of arrow A, and the plate 107 and the raised portion 105 are ejected from the recess 11 of the cylindrical member 2. As a result, magnet 1
Since the gap G ₂ between the disk 4 and the plate 107 becomes larger, the attraction force P ₂ of the magnet 14 acting on the plate 107 decreases, and the disk 100 is removed from the disk attachment/detachment device 1 . Below, other embodiments of the device of the present invention are shown in Figs.
This will be explained using Figure 1. Figure 8 is a perspective view of the disk attachment/detachment device 1 ';
The figure is a sectional view taken along the line CC. Cylindrical member 2 which is the base of the disk attaching/detaching device 1 '
A through hole 23 is formed in the axial center of the shaft 20. A shaft 22 having a magnet 21 having the same strength as the magnet 209 in FIG. An operating means 24 is formed at the upper end of the shaft 22, and a part of the operating means 24 is accommodated in a hole 25 formed in the upper part of the cylindrical member 20 so as to be movable in the direction of arrow A-B. , finger hooks 24 ₁ at both ends thereof,
24 ₂ protrudes to the outside of the cylindrical member 20 from notches 25 ₁ and 25 ₂ formed on the circumferential surface of the cylindrical member 20 at 180° intervals. Therefore, by moving the finger hooks 24 ₁ and 24 ₂ of the operating means 24 in the direction of the arrow A-B, the shaft 22, the magnet 21, and the operating means 24 are also moved together.
Movement of B in each direction is regulated by elastic stoppers 26 attached to the surface 25 ₃ of the hole 25 and the surface 25 ₄ of the hole 25, respectively. Also, a ring-shaped spring stopper 27 fitted in the recess 22 ₁ near the lower end of the shaft 22 and a small diameter recess 28 formed on the lower surface side of the cylindrical member 20
A coil spring 29 is suspended between the surface 28 ₁ and the surface 28 1 in a compressed state. Therefore, the surface 24 ₃ of the operating means 24 is in pressure contact with the surface 25 ₃ of the hole 25, and a predetermined eccentric force is applied to the columnar member 20 in the direction of arrow A. In the case of this embodiment, the eccentric force urging means for applying eccentric force to the operating means 24 and the shaft 22 is composed of a coil spring 26 and a spring stopper 27, but the invention is not limited to this, and for example, ,
Various embodiments are possible, such as a compressed coil spring may be applied between the surface ₂₅₄ of the hole 25 and the surface ₂₄₄ of the operating means 24. Further, a large-diameter recess 30 is formed on the lower surface of the columnar member 20 in succession to the recess 28, and the magnet 21 attached to the lower end of the shaft 22 is attached to the recess 30.
It is housed in the recess 30 and is movable in the direction of the arrow AB. Here, the inner diameter D ₄ of the recess 30 is slightly larger than the outer diameter D ₁ of the raised parts 105 and 106 of the substrates 103 and 104 of the disk 100 in FIG.
The depth H ₄ is larger than the height H ₁ of the rising parts 105 and 106. Then, when the operator attaches the disk 100 to the disk attachment/detachment device 1 ' in the same manner as in the previous embodiment, the plate 107 is attracted to the magnet ₂₁ with an attraction force _P3 through the gap G3, as shown in FIG. Then, the disk 100 is suctioned and fixed to the disk attachment/detachment device 1 '. However, FIG. 10 shows the disk 100 that the operator has suctioned and fixed to the disk attachment/detachment device 1 '.
is further attached to the turntable 200 . Here, this gap G ₃ is the turntable 200
Magnet 209 and plate 1 attached to
Since the gap G with 08 is smaller than ₁ ,
The suction force _P3 is set stronger than the suction force _P1 . Incidentally, in the case of this embodiment as in the above embodiment, by making the strengths of the magnet 21 and the magnet 209 equal and making the gap G ₃ smaller than the gap G ₁ ,
Although the configuration is such that the attraction force P ₃ is set to be stronger than the attraction force P ₁ , the present invention is not limited to this, and the attraction force P ₃ generated between the magnet 21 and the plate 107 is generated between the magnet 209 and the plate 108. It goes without saying that any structure may be used as long as it is larger than the attraction force _P1 . Therefore, if you hold the disk attachment/detachment device 1 ' in your hand from the state shown in FIG. 10 and lift it upward in the direction of arrow B of the turntable 200 as shown in FIG. 11, the suction force _P3 will be Since the force is set to be stronger than the force _P1 , the disk 100 is lifted up in the direction of arrow B together with the disk attachment/detachment device 1 ' and removed from the turntable 200 . From this state, put your fingers on the finger hooks 24, 24 ₂ of the disk attachment/detachment device 1 ', and place your thumb on the top surface of the columnar member ₂₀ ,
₂₄₂ is pulled up in the direction of arrow B against the repulsive force of the coil spring 29, the magnet 21 attached to the shaft 22 moves in the direction of arrow B, and the gap _G3 between the magnet 21 and the plate 107 becomes larger. Magnet 21 acting on plate 107
The suction force _P3 decreases, and the disk 100 is removed from the disk attachment/detachment device 1 '. On the other hand, there are 100 discs on the turntable 200 .
When installing the turntable 2 , perform the same operation from the state shown in Figure 10.
The disk attachment/detachment device 1 ' can be removed from the disk 100 which is attached to the disk 100 by suction. <<Effects of the invention>> As mentioned above, the disk attachment/detachment device of the present invention has the following effects:
a pressing side that presses a magnet member attached to the rotational center of the disk; a base body that movably holds the pressing shaft and has a through hole through which the pressing shaft is movably penetrated; and a base body that movably holds the pressing shaft; It consists of a magnet that is attached to a position facing the member and magnetically attracts the magnetic member. Therefore, by attaching the device of the present invention to the center of rotation of the disk, the magnetic member of the disk is attracted to the magnet attached to the base of the device, and the disk is attracted and fixed to the device. By holding the disc in your hand, you can attach it to a predetermined position on the turntable or remove it from the turntable without touching the disc directly. Further, the magnetic member at the center of rotation of the disk is attracted to a magnet attached to the turntable, and the disk is attached to the turntable by attraction. Therefore,
Especially when removing the disc from the turntable,
By using the device of the present invention, force acts on the magnetic member at the center of rotation of the disk, so that no unreasonable force is applied to the peripheral edge of the disk. Furthermore, when removing the disk that is suction-fixed to the device, in the first embodiment, the magnetic member is simply pressed with the pressing shaft, and in the second embodiment, the magnet and the magnetic member are removed by simply lifting the operating means. The gap between the disks becomes larger, the attraction force of the magnet acting on the magnetic member is reduced, and the disk can be easily removed from the device.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a disk attachment/detaching device which is an embodiment of the present invention, Figure 2 is a sectional view of a disk attached to the disk attachment/detachment device, and Figure 3 is a sectional view of a disk mounted on a turntable. FIG. 4 to FIG. 7 are cross-sectional views explaining the actual operation, FIG. 8 is a perspective view of another embodiment of the present invention, and FIG. 9 is the same as that shown in FIG. 8. C-C
10 and 11 are sectional views illustrating the actual operation of other embodiments of the present invention, FIG. 12 is a sectional view of the disk and turntable, and FIG. 13 is a sectional view of the disk mounted on the turntable. FIG. 1 , 1 '... Disc attachment/detaching device, 100 ... Disc, 200 ... Turntable, 2, 20...
...Cylindrical member (base body), 4...Press shaft, 5, 23...
...Through hole, 6...Operation member, 8, 29...Coil spring, 9...Stopper, 14, 21, 20
9...Magnet, 22...Shaft, 24...Operation unit, 27...Spring stopper, _G1 , _G2 , _G3
...Gap, P ₁ , P ₂ , P ₃ ... Attraction force, 107,1
08... Magnetic member, 109, 110... Center hole,
202... Centering section, 210... Rotating shaft.

Claims (1)

[Claims for Utility Model Registration] (1) A disk attachment/detachment device for attaching and detaching a disk having a magnetic member attached to its rotating center from a turntable having a magnet attached to attract the magnetic member; A pressing shaft for pressing, a base member having a through hole through which the pressing shaft passes through and movably holding the pressing shaft, and a base member attached to the base member at a position facing the magnetic member and magnetically connecting the magnetic member. A disk attachment/detachment device comprising: a magnet that attracts the disk; (2) A disk attachment/detachment device for attaching and detaching a disk having a magnetic member attached to its rotation center to a turntable having a magnet attached to attract the magnetic member; A shaft to which a magnetically attracting magnet is attached, a through hole through which the shaft is movably penetrated, and a recess in which the magnet is movably accommodated is formed on the side facing the magnetic member. 1. A disk attachment/detachment device characterized by comprising a base body.